The Email Engine Built for Precision & Scale
Dispatch high-deliverability transactional campaigns via your own SMTP servers. Validate recipient lists in real-time, generate tamper-proof QR tickets, and monitor delivery telemetry—with zero vendor lock-in.
Everything You Need to Run High-Impact Mail Operations
Engineered for organizations that refuse to compromise on data privacy, delivery speed, and custom integration requirements.
Connect Any SMTP Relay
Connect any custom SMTP relay—AWS SES, Mailgun, SendGrid, private Postfix servers, or Google Workspace. Maintain full data sovereignty with zero third-party per-email fees.
- Automatic host rotation & socket health checks
- Encrypted TLS credential storage in database
Pre-Send DNS & List Sanitization
Prevent bounces before they happen. Our pre-send verification engine performs async DNS MX lookups, scrubs duplicates, and normalizes recipient fields in real-time.
- Multi-record MX validation & invalid syntax alerts
- 1-click duplicate deduplication & null cleansing
Dynamic Passes & QR Code Engine
Issue cryptographically secure entry tickets, event badges, and automated PDF certificates. Embed dynamic QR tokens directly into email templates.
- Tamper-evident signed payload check-in tokens
- Real-time certificate rendering with PDFKit
Offline-Ready Gate Scanner PWA
Empower on-site event staff with an installable mobile PWA. Instant camera-based QR decoding, live check-in validation, and double-scan prevention.
- PIN-protected operator access without full admin rights
- Sub-second verification with audio & haptic feedback
Granular Telemetry & Quarantine
Track open rates, link click conversions, recipient device types, and geographic location. Automatically quarantine failed addresses to preserve sender reputation.
- Zero-pixel transparent open tracking & link rewrite
- 1-click batch retries on transient connection errors
Dual WYSIWYG & Code Editor
Write personalized emails using our rich-text visual designer or switch to syntax-highlighted HTML code mode. Auto-complete merge fields with real-time preview.
- Built-in template manager with reusable snippets
- DOMPurify sanitization & safe CSS inline engine
Dynamic Personalization Engine
Postly automatically detects merge variables (like {{name}}, {{event}}) and interpolates them at dispatch time. Test it live in this sandbox:
Hi Alex Rivera, Welcome to Global DevCon 2026! We're excited to have Acme Dynamics joining us this year. Your encrypted check-in pass has been generated. Simply show the dynamic QR code attached to this email at the entry kiosk for instant admission. Warm regards, The Postly Team
Simple, Transparent Plans Without Email Markups
Because you connect your own SMTP relay, you never pay per-email penalties as your subscriber base grows.
Community
For indie hackers and self-hosters.
- Single SMTP relay connection
- Unlimited emails via your credentials
- Visual & HTML campaign composer
- Pre-send DNS MX lookup
- Community GitHub support
Professional
For scaling teams, events, and organizations.
- Multi-node SMTP clustering & failover
- Dynamic QR pass issuance & verification
- Offline-ready Gate Scanner PWA (5 operator seats)
- Real-time telemetry: opens, clicks, device & geo
- Automated bounce quarantine & list cleansing
- Priority email support
Enterprise
For mission-critical infrastructure & high-volume events.
- Unlimited operator seats & cluster nodes
- Dedicated IP warmup guidance
- Custom SAML / SSO authentication
- Real-time audit log streaming to SIEM
- 99.99% Uptime SLA & dedicated Slack channel
Trusted by Engineers & Event Leads
See how teams run their communications without third-party vendor lock-in.
“Switching to Postly cut our transactional email costs by 85%. Connecting our AWS SES cluster took 3 minutes, and the pre-send DNS checks immediately caught bad emails before they could harm our sender reputation.”
“We issued 8,000 attendee tickets with dynamic QR codes for our annual summit. Our door staff used the mobile scanner PWA on standard phones—zero hardware rentals, sub-second check-ins, and zero double admissions.”
“The real-time telemetry is outstanding. Being able to see exact device distributions and immediate bounce quarantine without storing sensitive data on third-party marketing servers gives our compliance team complete peace of mind.”
Frequently Asked Questions
Everything you need to know about Postly architecture and delivery.
Take Control of Your Email Delivery Today
Join thousands of developers and operational teams sending reliable, verified emails with complete data sovereignty.